x, n = [int(s) for s in input().split()]
a = [int(s) for s in input().split()]
mod = 10**6 + 3

def powmod(ai, mod, memo):
    if ai in memo:
        return memo[ai]
    res = 0
    if ai == 0:
        res = 1
    elif ai % 2 == 0:
        pw = powmod(ai // 2, mod, memo)
        res = pw * pw % mod
    else:
        pw = powmod((ai - 1) // 2, mod, memo)
        res = x * pw * pw % mod
    if len(memo) < 10000000:
        memo[ai] = res
    return res

memo = {}
res = 0
for ai in a:
    res = (res + powmod(ai, mod, memo)) % mod
print(res)